New sorbent tube for hazardous air pollutants
Thursday, 18 February 2016 at 2:51:PM
International (Llantrisant, UK) has released a new sorbent tube dedicated to
the reliable analysis of polycyclic aromatic hydrocarbons (PAHs) in air.
new ‘PAH tube’ is the outcome of a detailed optimisation process for the
analysis of these highly challenging analytes, which are subject to very low
limit levels worldwide because of their carcinogenic properties.
Ferrante, Markes’ Marketing Manager for Consumable Products, explains the need
for the new tubes. “Existing solvent-based techniques for analysis of PAHs in
air are labour-intensive and prone to loss of analytes. Using our new optimised
thermal desorption tubes for the analysis of PAHs brings the big advantage of
full automation to this challenging application, as well as the outstanding
sensitivity inherent to thermal desorption”.
new tubes ensure the transfer of even the
heaviest PAHs from the sorbent sampling tube into the GC. Ferrante says “Contamination
of the analytical system can be a big problem when analysing these very
high-boiling compounds, but using the optimised sorbent tubes with our UNITY or
TD-100 instruments gives negligible carryover across the board, as well as
advantages, says Ferrante, are the convenience of needing significantly lower
sampling volumes than for solvent-based techniques, simplifying the sampling
process. She also points out that thermal desorption interfaces with the same
type of GC–MS analytical equipment widely used for monitoring VOCs such as
benzene in ambient air, meaning that laboratories needing to analyse PAHs can
easily incorporate the reliable analysis of PAHs into their existing workflows.
of the new tubes and the optimised thermal desorption protocol, along with full
performance data, are available in Markes Application Note 115.